A good number of bombers got taken out, so two parts is not entirely out of the question.

Road design is part of it but improving road design only improves ‘reasonable’ drivers, and things like chicanes, lane narrowing, and speed bumps cause issues for larger commercial vehicles like buses.

Persistent asshole drivers will still drive drunk or drive dementia, run red lights, or go three times the speed a road is built for.

“the systems and environments we place people in” is not just the road. It’s the licensing regime, the society that makes having a car necessary even if you can’t drive safely or afford to maintain it, and that doesn’t mandate effective ongoing training.